Разделы презентаций


Lect 2 презентация, доклад

Содержание

Quiz 2 Absolute error and standard deviation are in the following relation:

Слайды и текст этой презентации

Слайд 1



Quiz 1
Arithmetic mean of the following 1,2,3,2 numbers is:
2
8
10
12
3




Quiz 1 Arithmetic mean of the following 1,2,3,2 numbers is:2810123

Слайд 2 Quiz 2
Absolute error and standard deviation are in the

following relation:













Quiz 2 Absolute error  and standard deviation are in the following relation:

Слайд 3 Quiz 3












Quiz 3

Слайд 4Course of lectures «Contemporary Physics: Part1»
Lecture №2

Motion in One Dimension.
Motion

in Two Dimensions.

Course of lectures «Contemporary Physics: Part1»Lecture №2Motion in One Dimension.Motion in Two Dimensions.

Слайд 5Position, Velocity, and Speed
Kinematics is the part of classical mechanics,

which describes motion in terms of space and time while

ignoring the agents that caused that motion.

The particle model — we describe the moving object as a particle regardless of its size. A particle is a point-like object — that is, an object with mass but having infinitesimal
size.

Position, Velocity, and SpeedKinematics is the part of classical mechanics, which describes motion in terms of space

Слайд 6Position, Velocity, and Speed
The displacement of a particle is defined

as its change in position in some time interval. The

displacement is a vector quantity

Distance is the length of a path followed by a particle.

The average velocity of a particle is defined as the particle’s displacement Δx divided by the time interval Δt during which that displacement occurs.

The average speed of a particle, a scalar quantity, is defined as the total distance traveled divided by the total time interval required to travel that distance:

(1.1)

(1.2)

(1.3)

Position, Velocity, and SpeedThe displacement of a particle is defined as its change in position in some

Слайд 7Instantaneous Velocity and Speed
 
The instantaneous speed of a particle is

defined as the magnitude of its instantaneous velocity.
(1.4)
(1.5)

Instantaneous Velocity and Speed The instantaneous speed of a particle is defined as the magnitude of its instantaneous

Слайд 8Acceleration
(1.6)
 
(1.7)
The instantaneous acceleration equals the derivative of the velocity with

respect to time.
(1.8)

Acceleration(1.6) (1.7)The instantaneous acceleration equals the derivative of the velocity with respect to time.(1.8)

Слайд 9Acceleration

Acceleration

Слайд 10Motion Diagrams
a) Motion diagram for a car moving at constant

velocity (zero acceleration). b) Motion diagram for a car whose

constant acceleration is in the direction of its velocity. The velocity vector at each instant is indicated by a red arrow, and the constant acceleration by a violet arrow. c) Motion diagram for a car whose constant acceleration is in the direction opposite the velocity at each instant.
Motion Diagramsa) Motion diagram for a car moving at constant velocity (zero acceleration). b) Motion diagram for

Слайд 11One-Dimensional Motion with Constant Acceleration

One-Dimensional Motion with Constant Acceleration

Слайд 12One-Dimensional Motion with Constant Acceleration
(2.9)
(2.10)
(2.11)
(2.12)
(2.13)

One-Dimensional Motion with Constant Acceleration (2.9)(2.10)(2.11)(2.12)(2.13)

Слайд 13One-Dimensional Motion with Constant Acceleration

One-Dimensional Motion with Constant Acceleration

Слайд 14is a displacement vector
(2.14)

is a displacement vector(2.14)

Слайд 15The average velocity v of an object moving through a

displacement during a time interval (Δt) is described by the

formula

(2.15)

Note that the average velocity between points is independent of the path taken.

The average velocity v of an object moving through a displacement during a time interval (Δt) is

Слайд 18Average acceleration

Average acceleration

Слайд 21Two-Dimensional Motion with Constant Acceleration
If the position vector is known,
(2.19)
(2.20)

Two-Dimensional Motion with Constant AccelerationIf the position vector is known,(2.19)(2.20)

Слайд 22Two-Dimensional Motion with Constant Acceleration
 
(2.21)

Two-Dimensional Motion with Constant Acceleration (2.21)

Слайд 23Two-Dimensional Motion with Constant Acceleration
(2.22)

Two-Dimensional Motion with Constant Acceleration(2.22)

Слайд 24Projectile Motion
(1) g is constant over the range of motion

and is directed Downward
(2) the effect of air resistance is

negligible
Projectile Motion(1) g is constant over the range of motion and is directed Downward(2) the effect of

Слайд 25Projectile Motion

Projectile Motion

Слайд 26Projectile Motion
The vector expression for the position vector of the

projectile as a function of time
When analyzing projectile motion, consider

it to be the superposition of two motions:
constant-velocity motion in the horizontal direction and
free-fall motion in the vertical direction.
Projectile MotionThe vector expression for the position vector of the projectile as a function of timeWhen analyzing

Слайд 27Even though an object moves at a constant speed in

a circular path, it still has an acceleration.
Figure 2.5 (a)

A car moving along a circular path at constant speed experiences uniform circular motion. (b) As a particle moves from A to B, its velocity vector changes from vi to vf . (c) The construction for determining the direction of the change in velocity ∆v, which is toward the center of the circle for small ∆ r.
Even though an object moves at a constant speed in a circular path, it still has an

Слайд 28The acceleration vector in uniform circular motion is always perpendicular

to the path and always points toward the center of

the circle. An acceleration of this nature is called a centripetal acceleration (centripetal means center-seeking), and its magnitude is

(2.23)

where r is the radius of the circle. The subscript on the acceleration symbol reminds us that the acceleration is centripetal.

For uniform circular motion, the acceleration vector can only have a component perpendicular to the path, which is toward the center of the circle.

The acceleration vector in uniform circular motion is always perpendicular to the path and always points toward

Слайд 29In many situations it is convenient to describe the motion

of a particle moving with constant speed in a circle

of radius r in terms of the period T, which is defined as the time required for one complete revolution. In the time interval T the particle moves a distance of 2πr, which is equal to the circumference of the particle’s circular path. Therefore, because its speed is equal to the circumference of the circular path divided by the period, or v=2πr/T, it follows that

(2.24)

In many situations it is convenient to describe the motion of a particle moving with constant speed

Слайд 30Figure 2.6. The motion of a particle along an arbitrary

curved path lying in the xy plane. If the velocity

vector v (always tangent to the path) changes in direction and magnitude, the components of the acceleration a are a tangential component at and a radial component ar .
Figure 2.6. The motion of a particle along an arbitrary curved path lying in the xy plane.

Слайд 31The tangential acceleration component causes the change in the speed

of the particle. This component is parallel to the instantaneous

velocity, and is given by

The radial acceleration component arises from the change in direction of the velocity vector and is given by

where r is the radius of curvature of the path at the point in question.

The total acceleration vector a can be written as the vector sum of the component vectors:

(2.27)

(2.26)

(2.25)

The tangential acceleration component causes the change in the speed of the particle. This component is parallel

Слайд 32Quick Quiz 1 If a car is traveling eastward and

slowing down, what is the direction of the force on

the car that causes it to slow down? (a) eastward (b) westward (c) neither of these.

Quick Quiz 2 A ball is thrown upward. While the ball is in free fall, does its acceleration (a) increase (b) decrease (c) increase and then decrease (d) decrease and then increase (e) remain constant?

Quick Quiz 3 After a ball is thrown upward and is in the air, its speed (a) increases (b) decreases (c) increases and then decreases (d) decreases and then increases (e) remains the same.

Quick Quiz 1 If a car is traveling eastward and slowing down, what is the direction of

Обратная связь

Если не удалось найти и скачать доклад-презентацию, Вы можете заказать его на нашем сайте. Мы постараемся найти нужный Вам материал и отправим по электронной почте. Не стесняйтесь обращаться к нам, если у вас возникли вопросы или пожелания:

Email: Нажмите что бы посмотреть 

Что такое TheSlide.ru?

Это сайт презентации, докладов, проектов в PowerPoint. Здесь удобно  хранить и делиться своими презентациями с другими пользователями.


Для правообладателей

Яндекс.Метрика